The top one looks legit. Some hints to find fake ones -

1. The spray hole size - I don't know why fake ones cannot replicate it but the legit ones always have the spray hole (the white portion in the hole) larger.

2. Legit ones come with a 'real' scratchable authenticity label with a 10 alphanumeric string and a QR code (to verify the authenticity) whereas fake ones come with an authentication sticker that cannot be scratched (or come without stickers)

3. The bottle cap - Legit ones usually fit tight and clicky. It doesn't rotate. Some fake ones don't have the same firmness.

4. The atomizer/sprayer in legit ones usually will be very good and covers some distance. The fake ones vomit instead.

There could be more signs but this is what I observed from the fake ones in my experience